parser3/src/classes/math.C - diff

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Diff for /parser3/src/classes/math.C between versions 1.15 and 1.22

version 1.15, 2002/02/19 15:05:27	version 1.22, 2002/08/01 11:26:44
Line 1	Line 1
/** @file	/** @file
Parser: @b math parser class.	Parser: @b math parser class.

Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)	Copyright(c) 2001, 2002 ArtLebedev Group(http://www.artlebedev.com)
Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)	Author: Alexandr Petrosian <paf@design.ru>(http://paf.design.ru)

$Id$
*/	*/

	static const char* IDENT_MATH_C="$Id$";

#include "pa_common.h"	#include "pa_common.h"
#include "pa_vint.h"	#include "pa_vint.h"
#include "pa_vmath.h"	#include "pa_vmath.h"
#include "pa_request.h"	#include "pa_request.h"
	#include "pa_md5.h"

#ifdef WIN32	#ifdef WIN32
	// for threadID
# include <windows.h>	# include <windows.h>
#endif	#endif

	#ifdef HAVE_CRYPT_H
	#include <crypt.h>
	#endif

// defines	// defines

#define PI 3.1415926535	#define PI 3.1415926535
#define MATH_CLASS_NAME "math"	#define MAX_SALT 8

// class	// class

Line 34 public: // Methoded	Line 40 public: // Methoded

// methods	// methods
static unsigned int randomizer=0;	static unsigned int randomizer=0;
	static inline int _random(uint top) {
	return (int)(((double)((randomizer=rand())% RAND_MAX)) / RAND_MAX * top );
	}
static void _random(Request& r, const String& method_name, MethodParams *params) {	static void _random(Request& r, const String& method_name, MethodParams *params) {
Pool& pool=r.pool();	Pool& pool=r.pool();

Value& range=params->as_junction(0, "range must be expression");	Value& range=params->as_junction(0, "range must be expression");
double top=r.process(range).as_double();	double top=r.process_to_value(range).as_double();
if(top<=1)	if(top<=1)
throw Exception(0, 0,	throw Exception("parser.runtime",
&method_name,	&method_name,
"top must be above 1 (%g)", top);	"top must be above 1(%g)", top);

Value& result=*new(pool) VInt(pool, (int)(	r.write_no_lang(*new(pool) VInt(pool, _random(uint(top))));
((double)((randomizer=rand())% RAND_MAX)) / RAND_MAX * uint(top) ));
result.set_name(method_name);
r.write_no_lang(result);
}	}


typedef double (*math1_func_ptr)(double);	typedef double(*math1_func_ptr)(double);
static double frac(double param) { return param-trunc(param); }	static double frac(double param) { return param-trunc(param); }
static double degrees(double param) { return param /PI *180; }	static double degrees(double param) { return param /PI *180; }
static double radians(double param) { return param /180 *PI; }	static double radians(double param) { return param /180 *PI; }
Line 62 static void math1(Request& r,	Line 68 static void math1(Request& r,
Pool& pool=r.pool();	Pool& pool=r.pool();
Value& param=params->as_junction(0, "parameter must be expression");	Value& param=params->as_junction(0, "parameter must be expression");

Value& result=new(pool) VDouble(pool, (func)(r.process(param).as_double()));	double result=(*func)(r.process_to_value(param).as_double());
result.set_name(method_name);	r.write_no_lang(*new(pool) VDouble(pool, result));
r.write_no_lang(result);
}	}

#define MATH1(name) \	#define MATH1(name) \
Line 94 static void math2(Request& r,	Line 99 static void math2(Request& r,
Value& a=params->as_junction(0, "parameter must be expression");	Value& a=params->as_junction(0, "parameter must be expression");
Value& b=params->as_junction(1, "parameter must be expression");	Value& b=params->as_junction(1, "parameter must be expression");

Value& result=new(pool) VDouble(pool, (func)(	double result=(*func)(
r.process(a).as_double(),	r.process_to_value(a).as_double(),
r.process(b).as_double()));	r.process_to_value(b).as_double());
result.set_name(method_name);	r.write_no_lang(*new(pool) VDouble(pool, result));
r.write_no_lang(result);
}	}

#define MATH2(name) \	#define MATH2(name) \
Line 107 static void math2(Request& r,	Line 111 static void math2(Request& r,
}	}
MATH2(pow);	MATH2(pow);

	inline bool is_salt_body_char(int c) {
	return isalnum(c) \|\| c == '.' \|\| c=='/';
	}
	static size_t calc_prefix_size(const char *salt) {
	if(size_t salt_size=strlen(salt)) {
	if(!is_salt_body_char(salt[0])) { // $... {...
	const char *cur=salt+1; // skip
	while(is_salt_body_char(*cur++)) // ...$ ...}
	;
	return cur-salt;
	} else
	return 0;
	} else
	return 0;
	}
	static void _crypt(Request& r, const String& method_name, MethodParams *params) {
	Pool& pool=r.pool();
	const char *password=params->as_string(0, "password must be string").cstr();
	const char *maybe_bodyless_salt=params->as_string(1, "salt must be string").cstr();

	size_t prefix_size=calc_prefix_size(maybe_bodyless_salt);
	const char *normal_salt;
	char normalize_buf[MAX_STRING];
	if(prefix_size==strlen(maybe_bodyless_salt)) { // bodyless?
	strncpy(normalize_buf, maybe_bodyless_salt, MAX_STRING-MAX_SALT-1);
	char *cur=normalize_buf+strlen(normalize_buf);
	// sould add up MAX_SALT random chars
	static unsigned char itoa64[] = /* 0 ... 63 => ASCII - 64 */
	"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
	for(int i=0; i<MAX_SALT; i++)
	*cur++=itoa64[_random(64)];
	*cur=0;
	normal_salt=normalize_buf;
	} else
	normal_salt=maybe_bodyless_salt;

	/* FreeBSD style MD5 string
	*/
	if(strncmp(normal_salt, PA_MD5PW_ID, PA_MD5PW_IDLEN) == 0) {
	const size_t sample_size=120;
	char sample_buf=(char )pool.malloc(sample_size);
	pa_MD5Encode((const unsigned char *)password,
	(const unsigned char *)normal_salt, sample_buf, sample_size);
	r.write_pass_lang(*new(pool) String(pool, sample_buf));
	} else {
	#ifdef HAVE_CRYPT
	const char *sample_buf=crypt(password, normal_salt);
	if(!sample_buf // nothing generated
	\|\| !sample_buf[0] // generated nothing
	\|\| strncmp(sample_buf, normal_salt, prefix_size)!=0) // salt prefix not preserved
	throw Exception("parser.runtime",
	&method_name,
	"on this platform does not support '%.*s' salt prefix", prefix_size, normal_salt);

	r.write_pass_lang(*new(pool) String(pool, sample_buf));
	#else
	throw Exception("parser.runtime",
	&method_name,
	"salt must start with '" PA_MD5PW_ID "'");
	#endif
	}
	}

// constructor	// constructor

MMath::MMath(Pool& apool) : Methoded(apool) {	MMath::MMath(Pool& apool) : Methoded(apool, "math") {
set_name(*NEW String(pool(), MATH_CLASS_NAME));

// ^FUNC(expr)	// ^FUNC(expr)
#define ADD1(name) \	#define ADD1(name) \
add_native_method(#name, Method::CT_STATIC, _##name, 1, 1)	add_native_method(#name, Method::CT_STATIC, _##name, 1, 1)
Line 133 MMath::MMath(Pool& apool) : Methoded(apo	Line 198 MMath::MMath(Pool& apool) : Methoded(apo
// ^pow(x;y)	// ^pow(x;y)
ADD2(pow);	ADD2(pow);

	// ^crypt[password;salt]
	ADD2(crypt);
}	}

// in MSVC each thread has it's own pseudo-random sequence	// in MSVC each thread has it's own pseudo-random sequence
Line 147 void MMath::configure_admin(Request&) {	Line 214 void MMath::configure_admin(Request&) {
#else	#else
^ getpid()	^ getpid()
#endif	#endif
^ (unsigned int)time(NULL)	^(unsigned int)time(NULL)
);	);
if(!randomizer)	if(!randomizer)
randomizer=rand();	randomizer=rand();

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Removed from v.1.15
changed lines
	Added in v.1.22